patch 8.1.2417: MinGW/Cygwin build does not clean up all files

Problem:    MinGW/Cygwin build does not clean up all files.
Solution:   Delete *.map files. (Michael Soyka)

src/version.c

@@ -742,6 +742,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2417,
 /**/
     2416,
 /**/